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Electronic speckle interference fringe pattern filtering method

An electronic speckle interference and fringe image technology, which is applied in the field of optical detection and optical information processing, can solve the problems of not considering the direction of fringes, blurred fringes, etc.

Inactive Publication Date: 2010-06-16
TIANJIN UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

The current partial differential equation filtering does not consider the direction of the fringe, so when it is applied to high-density electronic speckle interference fringe image filtering, the fringe will be blurred

Method used

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  • Electronic speckle interference fringe pattern filtering method
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  • Electronic speckle interference fringe pattern filtering method

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Embodiment Construction

[0048] First introduce the construction principle of the directional partial differential equation diffusion model of the present invention below

[0049] The construction of the directional partial differential equation diffusion model is based on the variational method. The main idea of ​​this method is: design an energy functional to evaluate the smoothness of the image, and transform the extreme value problem of this functional into a pair of partial differential equations by the variational method Solution of the equation. When the energy functional takes different forms, different partial differential equation filtering models can be constructed

[0050] For example, the energy functional takes the following form

[0051] E ( u ) = ∫ Ω f ( | ▿ u | ) dxdy = ∫ ...

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Abstract

The invention relates to an electronic speckle interference fringe pattern filtering method, belonging to the optical detection and optical information processing technical field. The method comprises the following steps: determining the first-order partial derivative and second-order partial derivative of each pixel in an image according to the discrete scheme of spatial derivative term, then determining the numerical solution of each pixel in the image, calculating g function value gi and jn of each pixel in the image, repeating the above steps until the set the number of iterations and obtaining the filtered image. The invention fully considers the direction of fringes and ensures the scattering to move along the direction of fringes so that the edge can be maintained during filtering and the fringes can not be fuzzy even in the high-density area. Therefore, the method of the invention can be used for high density and high noise electronic speckle interference fringe pattern filtering.

Description

technical field [0001] The invention belongs to the technical field of optical detection and optical information processing, and relates to an interference fringe image filtering method. Background technique [0002] Partial differential equations image processing methods (partial differential equations image processing methods) is a novel image processing method that has gradually emerged and developed rapidly since the 1980s. In recent years, related content has increasingly become a hot spot for researchers in related fields. . Its application range covers almost the entire image processing field. The image processing technology based on differential equations makes people dig deeper and deeper into the essence of images and image processing, and try to transform the existing image processing methods with strict mathematical theory. Compared with traditional image processing techniques, the main advantages of partial differential equation image processing [12, 13]: (1) ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00
Inventor 唐晨阎海青韩林
Owner TIANJIN UNIV
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